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Programming-Idioms

History of Idiom 247 > diff from v11 to v12

Edit summary for version 12 by steenslag:
New Ruby implementation by user [steenslag]

Version 11

2020-12-27, 19:06:40

Version 12

2021-01-06, 01:26:46

Idiom #247 Filter list in-place

Remove all the elements from list x that don't satisfy the predicate p, without allocating a new list.
Keep all the elements that do satisfy p.

For languages that don't have mutable lists, refer to idiom #57 instead.

Idiom #247 Filter list in-place

Remove all the elements from list x that don't satisfy the predicate p, without allocating a new list.
Keep all the elements that do satisfy p.

For languages that don't have mutable lists, refer to idiom #57 instead.

Variables
x,p
Variables
x,p
Extra Keywords
keep conserve preserve mutable
Extra Keywords
keep conserve preserve mutable
Code
x.select!(&:p)